The NRA retweeted a tweet encouraging people to buy guns for loved ones on Valentine's Day. Click through the gallery for more information on Wednesday's school shooting.

The NRA retweeted a tweet encouraging people to buy guns for loved ones on Valentine's Day. Click through the gallery for more information on Wednesday's school shooting.

Photo: Screenshot Via Twitter

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A video monitor shows school shooting suspect Nikolas Cruz, center, making an appearance before Judge Kim Theresa Mollica in Broward County Court, Thursday, Feb. 15, 2018, in Fort Lauderdale, Fla. Cruz is accused of opening fire Wednesday at Marjory Stoneman Douglas High School in Parkland, Fla., killing more than a dozen people and injuring several.

This video screen grab image shows shooting suspect Nikolas Cruz on February 15, 2018 at Broward County Jail in Ft. Lauderdale, Florida. The heavily armed teenager who gunned down students and adults at a Florida high school was charged Thursday with 17 counts of premeditated murder, court documents showed. Nikolas Cruz, 19, killed fifteen people in a hail of gunfire at Marjory Stoneman Douglas High School in Parkland, Florida. Two others died of their wounds later in hospital, the sheriff's office said.

This video screen grab image shows shooting suspect Nikolas Cruz on February 15, 2018 at Broward County Jail in Ft. Lauderdale, Florida. The heavily armed teenager who gunned down students and adults at a

This booking photo obtained February 15, 2018 courtesy of the Broward County Sheriff's Office shows shooting suspect Nikolas Cruz. Authorities in Florida could offer no explanation Wednesday night as to why a former student armed with an AR-15 rifle opened fire at a high school earlier that day, killing at least 17 people. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for "disciplinary reasons," but was currently enrolled in Broward County Public Schools.Cruz, whose fellow students described him as "troubled," was arrested without incident in the nearby town of Coral Springs after the Valentine's Day rampage and taken to hospital with minor injuries, the sheriff said.

This booking photo obtained February 15, 2018 courtesy of the Broward County Sheriff's Office shows shooting suspect Nikolas Cruz. Authorities in Florida could offer no explanation Wednesday night as to why a

Police control a road near the Marjory Stoneman Douglas High School where 17 people were killed by a gunman yesterday, on February 15, 2018 in Parkland, Florida. Police arrested the suspect after a short manhunt, and have identified him as 19-year-old former student Nikolas Cruz.

Police control a road near the Marjory Stoneman Douglas High School where 17 people were killed by a gunman yesterday, on February 15, 2018 in Parkland, Florida. Police arrested the suspect after a short

Law enforcement officers block off the entrance to Marjory Stoneman Douglas High School, Thursday, Feb. 15, 2018 in Parkland, Fla. Nikolas Cruz was charged with 17 counts of premeditated murder on Thursday, the day after opening fire with a semi-automatic weapon at the school.

A bouquet of flowers placed by police tape near Marjory Stoneman Douglas High School, the day after a shooting there, in Parkland, Fla., Feb. 15, 2018. Authorities on Thursday charged 19-year-old Nikolas Cruz  who is suspected of gunning down students and adults at the school  with 17 counts of premeditated murder.

A bouquet of flowers placed by police tape near Marjory Stoneman Douglas High School, the day after a shooting there, in Parkland, Fla., Feb. 15, 2018. Authorities on Thursday charged 19-year-old Nikolas Cruz

Parents wait for news after a reports of a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (AP Photo/Joel Auerbach)

Parents wait for news after a reports of a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (AP Photo/Joel Auerbach)

Photo: Joel Auerbach/AP

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In this frame grab from video provided by WPLG-TV, law enforcement personnel arrest an unidentified man (in dark red), following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018. A former student opened fire at the Florida high school Wednesday, killing more than a dozen people and sending scores of students fleeing into the streets. (WPLG-TV via AP) less

In this frame grab from video provided by WPLG-TV, law enforcement personnel arrest an unidentified man (in dark red), following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, ... more

Photo: Associated Press

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Police vehicles block the road to Marjory Stoneman Douglas High School in Parkland, Florida, following a shooting that killed 17 people on February 14, 2018 in Parkland, Florida. A former student armed with an AR-15 rifle opened fire at a Florida high school, killing at least 17 people, officials said, in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for "disciplinary reasons." / AFP PHOTO / Gaston De CardenasGASTON DE CARDENAS/AFP/Getty Images less

Police vehicles block the road to Marjory Stoneman Douglas High School in Parkland, Florida, following a shooting that killed 17 people on February 14, 2018 in Parkland, Florida. A former student armed with an ... more

Photo: GASTON DE CARDENAS, AFP/Getty Images

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Parents meet at a hotel in Coral Springs, Fla., Wednesday, Feb. 14, 2018, to pick up their children, following a shooting at nearby Marjory Stoneman Douglas High in Parkland, Fla. A former student opened fire at the Florida high school Wednesday, killing more than a dozen people and sending scores of students fleeing into the streets. (Jim Rassol/South Florida Sun-Sentinel via AP) less

Parents meet at a hotel in Coral Springs, Fla., Wednesday, Feb. 14, 2018, to pick up their children, following a shooting at nearby Marjory Stoneman Douglas High in Parkland, Fla. A former student opened fire ... more

Photo: Jim Rassol, Associated Press

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Parents meet at a hotel in Coral Springs, Fla., Wednesday, Feb. 14, 2018, to pick up their children, following a shooting at nearby Marjory Stoneman Douglas High in Parkland, Fla. A former student opened fire at the Florida high school Wednesday, killing more than a dozen people and sending scores of students fleeing into the streets. (Jim Rassol/South Florida Sun-Sentinel via AP) less

Parents meet at a hotel in Coral Springs, Fla., Wednesday, Feb. 14, 2018, to pick up their children, following a shooting at nearby Marjory Stoneman Douglas High in Parkland, Fla. A former student opened fire ... more

Photo: Jim Rassol, Associated Press

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Broward County Sheriff's office public information officer Keyla Concepcion addresses the media following the shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A former student armed with an AR-15 rifle opened fire at a Florida high school, killing at least 17 people, officials said, in a harrowing shooting spree that saw terrified students hiding in closets and under desks as they texted for help. Broward County Sheriff Scott Israel identified the gunman as Nikolas Cruz, 19, a former student at Marjory Stoneman Douglas High School in Parkland who had been expelled for "disciplinary reasons." / AFP PHOTO / RHONA WISERHONA WISE/AFP/Getty Images less

Broward County Sheriff's office public information officer Keyla Concepcion addresses the media following the shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 ... more

Photo: RHONA WISE, AFP/Getty Images

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An angry father screams at police officers after the mass shooting at the Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018. At least 17 people were killed Wednesday at this school about an hour northwest of Miami, law enforcement officials said. A suspect, a former student, is in custody.

An angry father screams at police officers after the mass shooting at the Marjory Stoneman Douglas High School in Parkland, Fla., Feb. 14, 2018. At least 17 people were killed Wednesday at this school about an

Students released from a lockdown are overcome with emotion following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

Students released from a lockdown are overcome with emotion following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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Medical personnel tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida Sun-Sentinel via AP)

Medical personnel tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida Sun-Sentinel via AP)

Photo: John McCall/AP

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A law enforcement officer rushes toward Marjory Stoneman Douglas High School following a shooting at the school in Parkland, Fla., on Wednesday, Feb. 14, 2018.

A law enforcement officer rushes toward Marjory Stoneman Douglas High School following a shooting at the school in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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Parents confer with security following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami, February 14, 2018 . A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Parents confer with security following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami, February 14, 2018 . A gunman opened fire at

People react at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

People react at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the

Students released from a lockdown embrace following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

Students released from a lockdown embrace following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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A woman consoles another as parents wait for news regarding a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018. A shooter opened fire at the Florida high school Wednesday, killing people, sending students running out into the streets and SWAT team members swarming in before authorities took the shooter into custody. (AP Photo/Joel Auerbach)

A woman consoles another as parents wait for news regarding a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018. A shooter opened fire at the Florida high school

People gather waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

People gather waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla.,

A young woman, who walked out from the direction of the high school, gets a hug following a shooting at Marjory Stoneman Douglas High School, Wednesday, Feb. 14, 2018, in Parkland, Fla.

A young woman, who walked out from the direction of the high school, gets a hug following a shooting at Marjory Stoneman Douglas High School, Wednesday, Feb. 14, 2018, in Parkland, Fla.

Photo: Amy Beth Bennett/Associated Press

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Students wait to be picked up, Wednesday, Feb. 14, 2018, in Parkland, Fla. The shooting at a South Florida high school sent students rushing into the streets as SWAT team members swarmed in and locked down the building. Police were warning that the shooter was still at large even as ambulances converged on the scene and emergency workers appeared to be treating those possibly wounded. (AP Photo/Wilfredo Lee)

Students wait to be picked up, Wednesday, Feb. 14, 2018, in Parkland, Fla. The shooting at a South Florida high school sent students rushing into the streets as SWAT team members swarmed in and locked down the

People waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

People waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus following following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla.,

In this frame grab from video provided by WPLG-TV, emergency personnel wheel an injured person from the Marjory Stoneman Douglas High School in Parkland, Fla., following a shooting there on Wednesday, Feb. 14, 2018. (WPLG-TV via AP)

In this frame grab from video provided by WPLG-TV, emergency personnel wheel an injured person from the Marjory Stoneman Douglas High School in Parkland, Fla., following a shooting there on Wednesday, Feb. 14,

Police officers ride in the back of a pick up truck as they tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida Sun-Sentinel via AP)

Police officers ride in the back of a pick up truck as they tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South

Medical personnel tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida Sun-Sentinel via AP)

Medical personnel tend to a victim following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida Sun-Sentinel via AP)

Photo: John McCall/AP

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Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Students react following a shooting at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018. A gunman opened fire at the Florida

Students leave Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Students leave Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the

Young women, who walked out from the direction of the high school, are escorted by police following a shooting at Marjory Stoneman Douglas High School, Wednesday, Feb. 14, 2018, in Parkland, Fla.

Young women, who walked out from the direction of the high school, are escorted by police following a shooting at Marjory Stoneman Douglas High School, Wednesday, Feb. 14, 2018, in Parkland, Fla.

Photo: Amy Beth Bennett/Sun Sentinel/TNS

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Security speak with people near Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Security speak with people near Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened

A law enforcement officer tells anxious family members to move back, Wednesday, Feb. 14, 2018, in Parkland, Fla. A shooting at Marjory Stoneman Douglas High School sent students rushing into the streets as SWAT team members swarmed in and locked down the building. Police were warning that the shooter was still at large even as ambulances converged on the scene and emergency workers appeared to be treating those possibly wounded. (AP Photo/Wilfredo Lee)

A law enforcement officer tells anxious family members to move back, Wednesday, Feb. 14, 2018, in Parkland, Fla. A shooting at Marjory Stoneman Douglas High School sent students rushing into the streets as SWAT

People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law

Marjory Stoneman Douglas High School in Parkland, Broward County, Florida.

Marjory Stoneman Douglas High School in Parkland, Broward County, Florida.

Photo: DigitalGlobe/ScapeWare3d/DigitalGlobe/Getty Images

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The Broward County Sheriff's Offices confirms a suspect is in custody after a shooting at a high school in Parkland, Fla.

The Broward County Sheriff's Offices confirms a suspect is in custody after a shooting at a high school in Parkland, Fla.

Photo: Broward County Sheriff's Office

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President Donald J. Trump tweeted "prayers and condolences" after a school shooting in Parkland, Fla.

President Donald J. Trump tweeted "prayers and condolences" after a school shooting in Parkland, Fla.

Photo: President Donald J. Trump

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People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law

In this frame grab from video provided by WPLG-TV, students from the Marjory Stoneman Douglas High School in Parkland, Fla., evacuate the school following a shooting, Wednesday, Feb. 14, 2018. (WPLG-TV via AP)

In this frame grab from video provided by WPLG-TV, students from the Marjory Stoneman Douglas High School in Parkland, Fla., evacuate the school following a shooting, Wednesday, Feb. 14, 2018. (WPLG-TV via AP)

Photo: AP

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Anxious family members watch a rescue vehicle pass by, Wednesday, Feb. 14, 2018, in Parkland, Fla. A shooting at Marjory Stoneman Douglas High School school sent students rushing into the streets as SWAT team members swarmed in and locked down the building. (AP Photo/Wilfredo Lee)

Anxious family members watch a rescue vehicle pass by, Wednesday, Feb. 14, 2018, in Parkland, Fla. A shooting at Marjory Stoneman Douglas High School school sent students rushing into the streets as SWAT team

Students are released from a lockdown following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Students are released from a lockdown following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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A student shows a law enforcement officer a photo or video from his phone, Wednesday, Feb. 14, 2018, in Parkland, Fla. A shooting at Marjory Stoneman Douglas High School sent students rushing into the streets as SWAT team members swarmed in and locked down the building. Police were warning that the shooter was still at large even as ambulances converged on the scene and emergency workers appeared to be treating those possibly wounded. (AP Photo/Wilfredo Lee)

A student shows a law enforcement officer a photo or video from his phone, Wednesday, Feb. 14, 2018, in Parkland, Fla. A shooting at Marjory Stoneman Douglas High School sent students rushing into the streets

In this frame grab from video provided by WPLG-TV, students from the Marjory Stoneman Douglas High School in Parkland, Fla., evacuate the school following a shooting, Wednesday, Feb. 14, 2018. (WPLG-TV via AP)

In this frame grab from video provided by WPLG-TV, students from the Marjory Stoneman Douglas High School in Parkland, Fla., evacuate the school following a shooting, Wednesday, Feb. 14, 2018. (WPLG-TV via AP)

Photo: AP

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A parent talks on cellphone waiting for news after a reports of a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

A parent talks on cellphone waiting for news after a reports of a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: Joel Auerbach/AP

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Students run with their hands in the air following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

Students run with their hands in the air following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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Students released from a lockdown walk away following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Students released from a lockdown walk away following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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Fire rescue vehicles converge at Stoneman Douglas High School following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Fire rescue vehicles converge at Stoneman Douglas High School following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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An armored police vehicle arrives at Stoneman Douglas High School following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida Sun-Sentinel via AP)

An armored police vehicle arrives at Stoneman Douglas High School following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018. (John McCall/South Florida

Fire Rescue personnel work the scene at the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

Fire Rescue personnel work the scene at the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida.

Law enforcement personel work the scene at the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

Law enforcement personel work the scene at the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida.

A law enforcement officer directs traffic outside the school following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

A law enforcement officer directs traffic outside the school following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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Law enforcement officers block off a street, Wednesday, Feb. 14, 2018, in Parkland, Fla. The shooting at a South Florida high school sent students rushing into the streets as SWAT team members swarmed in and locked down the building. Police were warning that the shooter was still at large even as ambulances converged on the scene and emergency workers appeared to be treating those possibly wounded. (AP Photo/Wilfredo Lee)

Law enforcement officers block off a street, Wednesday, Feb. 14, 2018, in Parkland, Fla. The shooting at a South Florida high school sent students rushing into the streets as SWAT team members swarmed in and

People wait for loved ones as they are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

People wait for loved ones as they are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland,

Police and fire rescue vehicles converge on Stoneman Douglas High School following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Police and fire rescue vehicles converge on Stoneman Douglas High School following a shooting at Marjory Stoneman Douglas High School in Parkland, Fla., on Wednesday, Feb. 14, 2018.

Photo: John McCall/South Florida Sun-Sentinel Via AP

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People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law

Teens, who walked out from the direction of the high school, are escorted by police following a shooting at Marjory Stoneman Douglas High School, Wednesday, Feb. 14, 2018, in Parkland, Fla.

Teens, who walked out from the direction of the high school, are escorted by police following a shooting at Marjory Stoneman Douglas High School, Wednesday, Feb. 14, 2018, in Parkland, Fla.

Photo: Amy Beth Bennett/Sun Sentinel/TNS

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Waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018.

Waiting for word from students at Coral Springs Drive and the Sawgrass Expressway just south of the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018.

Photo: Amy Beth Bennett/Sun Sentinel/TNS

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Students are brought across Coral Springs Drive from the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018.

Students are brought across Coral Springs Drive from the campus of Stoneman Douglas High School in Parkland, Fla., after a shooting on Wednesday, Feb. 14, 2018.

Photo: Amy Beth Bennett/Sun Sentinel/TNS

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People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

People are brought out of the Marjory Stoneman Douglas High School after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law

The Marjory Stoneman Douglas High School is seen after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials continue to investigate the scene.

The Marjory Stoneman Douglas High School is seen after a shooting at the school that reportedly killed and injured multiple people on February 14, 2018 in Parkland, Florida. Numerous law enforcement officials

Students leave Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Students leave Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the

Sheriff vehicles are seen at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Sheriff vehicles are seen at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened

Students react at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the Florida high school, an incident that officials said caused "numerous fatalities" and left terrified students huddled in their classrooms, texting friends and family for help. The Broward County Sheriff's Office said a suspect was in custody.

Students react at Marjory Stoneman Douglas High School in Parkland, Florida, a city about 50 miles (80 kilometers) north of Miami on February 14, 2018 following a school shooting. A gunman opened fire at the

Retweet of Valentine's Day gun content disappears from NRA Twitter after Fla. shooting

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A retweet of a tweet encouraging people to buy each other guns for Valentine's Day disappeared from the National Rifle Association's Twitter timeline in the hours following a deadly school shooting in Florida on Wednesday, prompting speculation from the organization's detractors.